卫星姿态系统的抗干扰完整性容错控制

Integrity fault tolerant attitude controller of satellite with disturbance attenuation

研究了一种线性不确定系统的完整性容错控制问题。针对卫星姿态系统中的执行机构完全失效故障,采用4个反作用飞轮结构进行姿态控制,利用Riccati方程和线性矩阵不等式组,提出一种具有抗干扰特性且对执行机构完全失效故障具有完整性的状态反馈容错控制设计方法。在此基础上进一步得出该控制器可以用于更多种故障形式的结论。最后在卫星姿态系统上对此方法进行了数学仿真,结果验证了该方法的正确性和有效性。

An integrity fault tolerant control problem of uncertain linear system is studied. Based on the Riccati equation and linear matrix inequality, an integrity fault tolerant attitude controller with disturbance at- tenuation is designed for the actuator failure of the satellite by using four reaction wheels. Furthermore, the conclusion that the designed controller can be applied to more kinds of actuator failure forms can be drawn. The sim- ulation on the satellite attitude system demonstrates the correctness and effectiveness of the proposed method.